Update api and models for tag completion

Added username and requested_by

Added tests

Fixed make lint errors

Added BmarkMgr

Fixed make lint

Updated tagmgr tests

Added api tests

Fixed make lint errors

Comments added

Added model comments

Added make_bookmark in models tests
Merge pull request #480 from sammyshj/apipart3formerge

Update api and models for tag completion

Added username and requested_by

Added tests

Fixed make lint errors

Added BmarkMgr

Fixed make lint

Updated tagmgr tests

Added api tests

Fixed make lint errors

Comments added

Added model comments

Added make_bookmark in models tests